Official NHA Assessment

Race 6: BETWAY BOOST MR 82 HANDICAP (Open)

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Line Horse
Archimides
Reference for assessment
Exact Matches
1 / 10
Calculated = Official
Close Matches
2 / 10
Within 2 points
Significant Diffs
7 / 10
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
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1    Purple Pitcher       4    55.5    1    0.00     6.0   90    77           90    +0
2    Mo The Man           3    57.0    2    1.00     8.5   77    79           79    +2
3    Archimides           3    57.5    3    2.50     8.5   78    78           78    +0
4    Napoleon             3    55.5    4    2.60     8.5   73    74           74    +1
5    Bloomington          3    61.0    5    4.25     8.5   84    84           84    +0
6    Ryan's Dream         3    55.0    6    5.50     8.5   73    71           71    -2
7    Vesuvio              5    56.5    7    5.75     0.0   76    91           91    +15
8    Greenlight Magic     2    57.0    8    6.00     0.0   82    92           92    +10
9    Nordic Rebel         8    59.5    9    6.75     0.0   81    97           97    +16
10   Rain Or Shine        4    58.0    10   8.25     6.0   78    82           82    +4
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Purple Pitcher 90 121 90 +31 6.0 -
2 Mo The Man 77 83 79 +4 8.5 -
3 Archimides Line 78 70 78 -8 8.5
4 Napoleon 73 72 74 -2 8.5 -
5 Bloomington 84 69 84 -15 8.5 -
6 Ryan's Dream 73 65 71 -6 8.5 -
7 Vesuvio 76 85 91 -6 0.0 -
8 Greenlight Magic 82 74 92 -18 0.0 -
9 Nordic Rebel 81 81 97 -16 0.0 -
10 Rain Or Shine 78 82 82 ✓ Match 6.0 -
Assessment Methodology
Calculation Steps:
  1. Identify Line Horse - consistent performer used as reference
  2. Calculate WFA Allowance based on age, distance, and month
  3. Apply Drag Adjustment for beaten margin
  4. Calculate Actual Weight Performance:
    Weight - Drag - WFA
  5. Compare to Line Horse to determine race rating
  6. Apply special rules (maiden caps, layoff allowance)
Key Formulas:
  • Drag Effect: Varies by distance (see Benchmarks page)
  • 1 length ≈ 1kg at 1 mile (1600m)
  • WFA Scale: Based on Admiral Rous's 1855 table
  • Rating Points: 1kg = 2 rating points